Circle Methods 
The Circle type exposes the following members.
Name  Description  

ClosestParameter 
Gets the parameter on the circle which is closest to a test point.
 
ClosestPoint 
Gets the point on the circle which is closest to a test point.
 
DerivativeAt 
Determines the value of the Nth derivative at a parameter.
 
EpsilonEquals 
Check that all values in other are within epsilon of the values in this
 
Equals  (Inherited from ValueType.)  
GetHashCode  (Inherited from ValueType.)  
GetType  (Inherited from Object.)  
IsInPlane 
Evaluates whether or not this circle is coplanar with a given plane.
 
PointAt 
Circles use trigonometric parameterization:
t > center + cos(t)*radius*xaxis + sin(t)*radius*yaxis.
 
Reverse 
Reverse the orientation of the circle. Changes the domain from [a,b]
to [b,a].
 
Rotate(Double, Vector3d) 
Rotates the circle through a given angle.
 
Rotate(Double, Vector3d, Point3d) 
Rotates the circle through a given angle.
 
Rotate(Double, Double, Vector3d) 
Rotates the circle around an axis that starts at the base plane origin.
 
Rotate(Double, Double, Vector3d, Point3d) 
Rotates the circle around an axis that starts at the provided point.
 
TangentAt 
Circles use trigonometric parameterization:
t > center + cos(t)*radius*xaxis + sin(t)*radius*yaxis.
 
ToNurbsCurve 
Constructs a nurbs curve representation of this circle.
This amounts to the same as calling NurbsCurve.CreateFromCircle().
 
ToNurbsCurve(Int32, Int32) 
Create a uniform nonratonal cubic NURBS approximation of a circle.
 
ToString  (Inherited from ValueType.)  
Transform 
Transforms this circle using an xform matrix.
 
Translate 
Moves the circle.
 
TryFitCircleToPoints 
Attempt to fit a circle through a set of points.
 
TryFitCircleTT 
Try to fit a circle to two curves using tangent relationships.
 
TryFitCircleTTT 
Try to fit a circle to three curves using tangent relationships.
